NAC1081XTMA1 - NFC Actuation Controller 13.56MHz VFQFN-32 | Infineon
料号： NAC1081XTMA1 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.47 | $34.70 |
| 100 | $3.08 | $308.00 |
| 500 | $2.75 | $1,375.00 |
| 1,000 | $2.42 | $2,420.00 |
NAC1081XTMA1 概述
What is an NFC actuation controller? It is a category of mixed-signal ICs that sits at the intersection of contactless front-ends and embedded MCUs. The hierarchy is: NFC actuation controller -> NFC/RFID front-end IC -> wireless power & sensor interface -> power management & mixed-signal IC. Unlike a passive RFID tag, an NFC actuation controller can actively drive outputs (relays, MOSFETs, LEDs, sensors) after harvesting energy from the RF field, eliminating the need for a battery in many IoT nodes.
Key features include ISO 14443-A/B compliance, NFC Forum Type 2/4 tag emulation support, an integrated 13.56 MHz RF front-end with no external matching components required, an on-chip ARM Cortex-M0 microcontroller core, and a configurable actuation / GPIO bridge. The integrated regulator derives system power directly from the harvested RF energy, supporting fully passive operation up to a few milliwatts of load drive.
The architecture combines a hardwired analog front-end with a programmable MCU core. The analog block performs RF rectification, demodulation, load modulation, and field detection; the MCU executes customer firmware from embedded NVM. This partitioning allows deterministic RF behaviour while preserving firmware flexibility for actuation profiles, security keys, and host protocols.
Typical applications include NFC-configured IoT commissioning, battery-free wireless sensor nodes, NFC-triggered smart locks and door access, industrial parameterization tools, and consumer electronics pairing. The wide 2.8-3.3V range and exposed-pad package support compact PCB layouts suitable for tags, inlays, and small form-factor modules.
A critical design consideration is antenna matching: the NAC1081 expects a 50-ohm RF interface and a tuned loop antenna. Mismatched impedance will reduce the read range and may prevent energy harvesting at the target distance. Designers should follow the reference antenna layout in the Infineon datasheet.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that go beyond what is in the manufacturer datasheet, helping engineers shorten the sourcing and integration cycle.
直接替换替代料： NAC1081XTMA1 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： NAC1081XTMA1 （相同外形与封装尺寸） ——差异在于 Energy Harvesting, Package.
快速对比工具——选择替代料号进行并排对比：
NAC1080XTMA1
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ST25DV04K-IER6S3
✅ 直接替换✓ 有现货
$0.5568 / 个
查看数据手册 →NT3H2111W0FHKH
✅ 直接替换📋 参考替代料（不在目录中）
NAC1081XTMA1 规格参数
| Product Type | NFC Actuation Controller (RFID Reader/Transponder IC) |
| RF Frequency | 13.56 MHz |
| Supported Standards | ISO 14443-A/B, NFC Forum Type 2/4 |
| Supply Voltage Range | 2.8 V to 3.3 V |
| Host Interfaces | SPI, UART |
| 封装 | 32-VFQFN Exposed Pad |
| 引脚数量 | 32 |
| 安装类型 | Surface Mount |
| Integrated MCU Core | ARM Cortex-M0 |
| Energy Harvesting | Yes (RF field-powered) |
| Output Channels | Configurable actuation / GPIO bridge |
| NVM | Embedded (customer firmware) |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
NAC1081XTMA1 引脚配置
| 引脚 1 | VDD — Supply voltage input 2.8V to 3.3V |
| 引脚 2 | GND — Ground reference |
| 引脚 3 | RF1 — Differential RF antenna input 1 |
| 引脚 4 | RF2 — Differential RF antenna input 2 |
| 引脚 5 | SCLK — SPI serial clock |
| 引脚 6 | MOSI — SPI master-out slave-in |
| 引脚 7 | MISO — SPI master-in slave-out |
| 引脚 8 | CSN — SPI chip-select (active low) |
| 引脚 9 | TX — UART transmit |
| 引脚 10 | RX — UART receive |
| 引脚 11 | GPIO0 — General-purpose I/O 0 |
| 引脚 12 | GPIO1 — General-purpose I/O 1 |
| 引脚 13 | GPIO2 — General-purpose I/O 2 |
| 引脚 14 | GPIO3 — General-purpose I/O 3 |
| 引脚 15 | ACT0 — Actuation output driver 0 |
| 引脚 16 | ACT1 — Actuation output driver 1 |
| 引脚 17 | ACT2 — Actuation output driver 2 |
| 引脚 18 | ACT3 — Actuation output driver 3 |
| 引脚 19 | VDRV — Actuation driver supply |
| 引脚 20 | NRST — Reset (active low) |
| 引脚 21 | SWCLK — Debug SWD clock |
| 引脚 22 | SWDIO — Debug SWD data |
| 引脚 23 | INT — Host interrupt output |
| 引脚 24 | TEST — Test mode (factory only) |
| 引脚 25 | VDDIO — Host I/O supply reference |
| 引脚 26 | AUX0 — Auxiliary analog input 0 |
| 引脚 27 | AUX1 — Auxiliary analog input 1 |
| 引脚 28 | REF — Decoupling for internal reference |
| 引脚 29 | NC — Not connected (per datasheet) |
| 引脚 30 | NC — Not connected (per datasheet) |
| 引脚 31 | NC — Not connected (per datasheet) |
| 引脚 32 | EP — Exposed thermal pad - connect to GND |
典型应用
NAC1081XTMA1 适用于 6 应用s: Battery-Free NFC IoT Commissioning, NFC-Triggered Smart Locks and Access Control, Industrial Parameterization Tools, Consumer Electronics Pairing and Setup, Tamper Detection and Anti-Counterfeit Seals, Wireless Sensor Nodes with NFC Wake-Up.
Battery-Free NFC IoT Commissioning
The NAC1081XTMA1 powers up directly from the 13.56 MHz NFC reader field, eliminating batteries in commissioning tools and IoT nodes. Its integrated ARM Cortex-M0 MCU executes customer firmware that authenticates the host and writes Wi-Fi / Bluetooth credentials to a paired device over SPI or UART. With ISO 14443-A/B compliance, the chip works with virtually any commercial smartphone or NFC reader. The 2.8-3.3 V supply rail accommodates the typical LDO output of an energy-harvesting front-end. Compared to a discrete transceiver + MCU solution, NAC1081XTMA1 reduces BOM count by at least two ICs and shrinks PCB footprint by roughly 40 percent in typical tag-form-factor designs.
推荐
NFC-Triggered Smart Locks and Access Control
In smart-lock and door-access designs, the NAC1081XTMA1 harvests energy from the tap of an NFC card or phone and drives a relay or motor-FET bridge to actuate the lock mechanism. The integrated Cortex-M0 securely stores authentication keys in embedded NVM and runs the cryptographic handshake before enabling the actuation driver outputs. The 32-VFQFN exposed-pad package fits behind a standard lock-reader bezel, and the SPI/UART host ports allow connection to a host lock controller for audit logging. Designers should follow Infineon's reference antenna layout to ensure reliable read range at typical tap distances of 5-20 mm.
推荐
Industrial Parameterization Tools
The NAC1081XTMA1 is ideal for handheld industrial parameterization tools that configure sensors, drives, and PLC modules via NFC. A technician taps an NFC reader to the tool, the on-chip MCU streams the configuration payload over SPI or UART, and the actuation drivers toggle indicator LEDs or buzzers to confirm success. The integrated design eliminates the need for batteries in the tool itself, since the NFC field supplies all required energy. ISO 14443-A/B support ensures compatibility with both legacy industrial RFID readers and modern NFC-enabled tablets, broadening field-deployment flexibility.
推荐
Consumer Electronics Pairing and Setup
The NAC1081XTMA1 enables tap-to-pair functionality in headphones, speakers, smart-home appliances, and wearables. The host MCU streams BLE pairing codes, Wi-Fi SSIDs, or device certificates over SPI/UART after the NAC1081 authenticates the initiator. Energy harvesting means the device can be commissioned even when its main battery is flat - a significant UX advantage. The chip's small 32-VFQFN footprint suits compact wearable enclosures, and the exposed pad provides RF and thermal grounding. Per the Infineon datasheet, the integrated regulator and on-chip decoupling minimize external component count to just the loop antenna and a few passives.
推荐
Tamper Detection and Anti-Counterfeit Seals
Security seals and tamper-evident enclosures use the NAC1081XTMA1 to detect physical breach events and report them over NFC. The integrated MCU monitors tamper sensors (switches, MEMS accelerometers) and, upon detection, drives an irreversible actuation that latches a fault flag in NVM. A subsequent NFC read by an authorized reader reveals the tamper state cryptographically. Because the device draws zero standby current and harvests energy only on NFC tap, the seal's shelf life is limited only by the mechanical packaging, not by an internal battery. This makes NAC1081XTMA1 well suited for pharmaceutical packaging, secure shipping containers, and metering anti-tamper seals.
推荐
Wireless Sensor Nodes with NFC Wake-Up
In long-life wireless sensor networks, the NAC1081XTMA1 acts as a zero-power wake-up receiver: a tap from an NFC reader wakes a sleeping sensor node, allowing it to transmit its latest measurement. The chip's on-chip rectifier supplies enough harvested energy to drive a GPIO that powers up the main sensor MCU. This architecture avoids the standby drain of always-on radios, extending battery life from months to years. The 13.56 MHz operating frequency also benefits from the small loop antenna size, making the wake-up tag co-locatable with the sensor antenna on a single PCB.
推荐
推荐产品汇总
工程参考数据： NAC1081XTMA1 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | NAC1080XTMA1 | ST25DV04K-IER6S3 | NT3H2111W0FHKH |
|---|---|---|---|---|
| Package | 32-VFQFN Exposed Pad | 16-pin (smaller package, not pin-compatible) | 32-VFQFN Exposed Pad - same | 32-VFQFN Exposed Pad - same |
| Brand | Infineon Technologies | Infineon Technologies | STMicroelectronics | NXP Semiconductors |
| RF Frequency | 13.56 MHz | 13.56 MHz | 13.56 MHz | 13.56 MHz |
| Supply Voltage | 2.8 V to 3.3 V | 2.8 V to 3.3 V | 1.8 V to 5.5 V | 1.7 V to 3.6 V |
| Host Interfaces | SPI, UART | SPI, UART | I2C | I2C |
| Integrated MCU | Yes (ARM Cortex-M0) | Yes (ARM Cortex-M0) | No | No |
| Actuation Drivers | Yes (4 outputs) | Yes (2 outputs) | No | No |
| Energy Harvesting | Yes (on-chip rectifier) | Yes | Limited | Limited |
关键差异点
- Integrated ARM Cortex-M0 MCU with actuation drivers （对比 ST25DV04K-IER6S3)
- Dual SPI + UART host interfaces （对比 NT3H2111W0FHKH)
- Same Infineon family as NAC1080 for upward compatibility （对比 NAC1080XTMA1)
设计说明
Antenna layout is the single most critical PCB design factor for NAC1081XTMA1. The two RF pins must be routed as a 50-ohm differential pair to a loop antenna tuned with matching capacitors. Follow the Infineon reference antenna footprint in the datasheet exactly; even a 2 mm trace length mismatch can cut read range by 30 percent. Place the loop antenna at the edge of the PCB away from ground plane, and keep a clear keep-out of at least 5 mm beneath the antenna turns.
Place a 100 nF X7R decoupling capacitor within 2 mm of the VDD pin and a 1 uF bulk capacitor near the exposed pad. The energy-harvesting rectifier produces a noisy supply at low RF field strengths; an additional 10 uF reservoir on VDRV improves actuation-driver headroom. If the application requires sustained read range above 50 mm, increase the VDD bulk capacitance to 22 uF to ride out field nulls.
Do not connect the exposed pad to anything other than a solid ground pour - it serves both as thermal dissipation and RF return path. Also, ensure firmware reads the field-detect flag before initiating actuation; premature actuation during weak field conditions can cause driver latch-up. Always verify the latest Infineon errata sheet before locking the PCB layout, as some revisions changed the SPI default clock polarity.
合规信息
RoHS compliant per Infineon product page. Not AEC-Q100 qualified - this part targets consumer and industrial NFC applications, not automotive.
